/* RoboNeural AI — Dark Industrial Platform */
:root {
  --bg-primary: #1A1D21;
  --bg-graphite: #22262C;
  --bg-charcoal: #2A2F36;
  --bg-steel: #343A42;
  --accent: #5B7CFF;
  --accent-dim: rgba(91, 124, 255, 0.15);
  --text-primary: #E8EAED;
  --text-muted: #B8BFC8;
  --text-dim: #6B7280;
  --border: rgba(91, 124, 255, 0.35);
  --border-solid: #5B7CFF;
  --radius-card: 4px;
  --sidebar-w: 260px;
  --top-header-h: 56px;
  --font-head: "Space Grotesk", system-ui, sans-serif;
  --font-mono: "DM Mono", ui-monospace, monospace;
  --max-content: 1080px;
  --transition: 0.22s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-head);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  font-size: 1rem;
  min-height: 100vh;
}

img { max-width: 100%; height: auto; display: block; }
.main-wrap a:not(.btn-primary):not(.btn-secondary) { color: var(--accent); text-decoration: none; transition: color var(--transition); }
.main-wrap a:not(.btn-primary):not(.btn-secondary):hover { color: #7B96FF; }

.surface-graphite { background: var(--bg-graphite); }
.surface-charcoal { background: var(--bg-charcoal); }
.surface-steel { background: var(--bg-steel); }
.surface-accent { background: var(--accent); color: var(--bg-primary); }

/* Layout shell */
.site-shell {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-w);
  height: 100vh;
  background: var(--bg-graphite);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 200;
  overflow-y: auto;
}

.sidebar-brand {
  padding: 1.5rem 1.25rem 1rem;
  border-bottom: 1px solid var(--border);
}

.sidebar-brand a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-primary);
  text-decoration: none;
}

.sidebar-brand a:hover { color: var(--accent); }

.logo-mark {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.brand-text {
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.sidebar-nav {
  flex: 1;
  padding: 1rem 0;
  list-style: none;
}

.sidebar-nav li a {
  display: block;
  padding: 0.65rem 1.25rem;
  color: #fff;
  font-size: 0.9rem;
  font-weight: 500;
  border-left: 3px solid transparent;
  transition: background var(--transition), border-left-color var(--transition);
}

.sidebar-nav li a:hover,
.sidebar-nav li a.is-active {
  color: #fff;
  background: var(--accent-dim);
  border-left-color: var(--accent);
}

.sidebar-footer {
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-dim);
  line-height: 1.5;
}

/* Main area */
.main-wrap {
  margin-left: var(--sidebar-w);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  width: calc(100% - var(--sidebar-w));
}

.top-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--top-header-h);
  background: rgba(26, 29, 33, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
}

.top-header-serial {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

.top-header-cta {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 0.4rem 0.65rem;
  border-radius: var(--radius-card);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 190;
}

main { flex: 1; }

.container {
  max-width: var(--max-content);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 4rem 0;
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
}

.section-lead {
  color: var(--text-muted);
  max-width: 62ch;
  margin-bottom: 2rem;
}

/* Hero Pattern K */
.hero-k {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: flex-end;
  background-image:
    linear-gradient(135deg, rgba(26,29,33,0.88) 0%, rgba(34,38,44,0.75) 45%, rgba(26,29,33,0.92) 100%),
    url('/images/roboneuralai-01-hero-factory-command.jpg');
  background-size: cover;
  background-position: center;
  padding: 3rem 0 4rem;
}

.hero-k-inner {
  width: 100%;
  max-width: var(--max-content);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 2.5rem;
  align-items: end;
}

.hero-k-content h1 {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: 1rem;
}

.hero-k-content .hero-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.hero-k-content p {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 52ch;
}

.command-panel {
  background: rgba(34, 38, 44, 0.92);
  border: 1px solid var(--border-solid);
  border-radius: var(--radius-card);
  padding: 1.25rem;
  backdrop-filter: blur(6px);
}

.command-panel-header {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.metric-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.45rem 0;
  border-bottom: 1px solid rgba(91,124,255,0.12);
}

.metric-row:last-child { border-bottom: none; }

.metric-label {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.metric-value {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-primary);
}

/* Cards */
.card {
  background: var(--bg-charcoal);
  border: 1px solid var(--border-solid);
  border-radius: var(--radius-card);
  padding: 1.5rem;
}

.card-grid {
  display: grid;
  gap: 1.25rem;
}

.card-grid-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid-2 { grid-template-columns: repeat(2, 1fr); }

.card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
}

.card p {
  color: var(--text-muted);
  font-size: 0.92rem;
}

/* Metrics strip */
.metrics-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border-solid);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.metric-block {
  background: var(--bg-charcoal);
  padding: 1.5rem 1.25rem;
  text-align: center;
}

.metric-block .num {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 500;
  color: var(--accent);
  display: block;
  margin-bottom: 0.35rem;
}

.metric-block .lbl {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* Pillars */
.pillar-icon {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

/* Case mosaic */
.case-mosaic {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 1.25rem;
}

.case-mosaic img {
  border-radius: var(--radius-card);
  border: 1px solid var(--border-solid);
  width: 100%;
  object-fit: cover;
}

.case-mosaic .case-tall { height: 100%; min-height: 280px; object-fit: cover; }

/* Stack list */
.stack-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.stack-item {
  background: var(--bg-steel);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 1rem 1.15rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.stack-item strong {
  display: block;
  color: var(--accent);
  margin-bottom: 0.25rem;
  font-weight: 500;
}

/* Spec FAQ table */
.spec-table {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border: 1px solid var(--border-solid);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.spec-row {
  display: contents;
}

.spec-q, .spec-a {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
}

.spec-q {
  background: var(--bg-steel);
  font-weight: 600;
  font-size: 0.9rem;
}

.spec-a {
  background: var(--bg-charcoal);
  color: var(--text-muted);
  font-size: 0.88rem;
}

/* CTA */
.cta-block {
  text-align: center;
  padding: 3.5rem 2rem;
  border: 1px solid var(--border-solid);
  border-radius: var(--radius-card);
  background: var(--bg-charcoal);
}

a.btn-primary,
button.btn-primary,
.btn-primary {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.85rem 1.75rem;
  border-radius: 0;
  border: none;
  cursor: pointer;
  transition: none;
  text-decoration: none;
  letter-spacing: 0.02em;
  -webkit-tap-highlight-color: transparent;
}

a.btn-primary:hover,
a.btn-primary:focus,
a.btn-primary:visited,
a.btn-primary:active,
a.btn-primary:link,
button.btn-primary:hover,
button.btn-primary:focus,
button.btn-primary:active,
.btn-primary:hover {
  background: #6d8fff;
  color: #fff;
}

.btn-secondary {
  display: inline-block;
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--border-solid);
  font-weight: 600;
  font-size: 0.85rem;
  padding: 0.7rem 1.4rem;
  border-radius: 0;
  cursor: pointer;
  text-decoration: none;
}

.btn-secondary:hover {
  background: var(--accent-dim);
  color: var(--accent);
}

/* Page hero (inner pages) */
.page-hero {
  padding: 3rem 0 2rem;
  border-bottom: 1px solid var(--border);
}

.page-hero h1 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
}

.page-hero p {
  color: var(--text-muted);
  max-width: 60ch;
}

/* Program cards */
.programme-card {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 1.5rem;
  background: var(--bg-charcoal);
  border: 1px solid var(--border-solid);
  border-radius: var(--radius-card);
  padding: 1.75rem;
  margin-bottom: 1.25rem;
  align-items: start;
}

.programme-card img {
  border-radius: var(--radius-card);
  border: 1px solid var(--border);
  width: 100%;
  height: 160px;
  object-fit: cover;
}

.programme-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.35rem;
}

.tier {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  margin-top: 0.75rem;
  display: block;
}

/* Service cards */
.service-card {
  background: var(--bg-charcoal);
  border: 1px solid var(--border-solid);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.service-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.service-card-body {
  padding: 1.25rem;
}

/* About layout */
.about-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

.about-split img {
  border-radius: var(--radius-card);
  border: 1px solid var(--border-solid);
}

.portrait-card img {
  width: 100%;
  max-width: 320px;
  border-radius: var(--radius-card);
  border: 1px solid var(--border-solid);
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}

.contact-details {
  list-style: none;
}

.contact-details li {
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.92rem;
}

.contact-details strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 0.2rem;
}

.contact-lobby img {
  border-radius: var(--radius-card);
  border: 1px solid var(--border-solid);
  width: 100%;
  object-fit: cover;
}

/* Forms */
.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 500;
  margin-bottom: 0.35rem;
  color: var(--text-muted);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  background: var(--bg-steel);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  color: var(--text-primary);
  padding: 0.65rem 0.85rem;
  font-family: var(--font-head);
  font-size: 0.9rem;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.form-group textarea { min-height: 120px; resize: vertical; }

.form-consent {
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.form-consent input { width: auto; margin-top: 0.2rem; }

.hp-field {
  position: absolute;
  left: -9999px;
  opacity: 0;
  height: 0;
  width: 0;
  overflow: hidden;
}

.form-success {
  background: var(--accent-dim);
  border: 1px solid var(--border-solid);
  border-radius: var(--radius-card);
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
  font-size: 0.9rem;
}

/* Legal prose */
.legal-prose h2 {
  font-size: 1.2rem;
  margin: 2rem 0 0.75rem;
}

.legal-prose h3 {
  font-size: 1rem;
  margin: 1.5rem 0 0.5rem;
  color: var(--text-primary);
}

.legal-prose p,
.legal-prose li {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-bottom: 0.75rem;
}

.legal-prose ul {
  padding-left: 1.25rem;
  margin-bottom: 1rem;
}

.legal-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

/* Disclaimer */
.disclaimer {
  background: var(--bg-steel);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 1rem 1.25rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin: 2rem 0;
  line-height: 1.55;
}

/* Footer */
.site-footer {
  background: var(--bg-graphite);
  border-top: 1px solid var(--border);
  padding: 2.5rem 0 1.5rem;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.footer-col p,
.footer-col li {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 0.35rem; }
.footer-col a { color: var(--text-muted); }
.footer-col a:hover { color: var(--accent); }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 1rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-dim);
}

/* Cookie banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: var(--sidebar-w);
  right: 0;
  background: var(--bg-charcoal);
  border-top: 1px solid var(--border-solid);
  padding: 1.25rem 1.5rem;
  z-index: 300;
  display: none;
}

.cookie-banner.is-visible { display: block; }

.cookie-inner {
  max-width: var(--max-content);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  justify-content: space-between;
}

.cookie-text {
  flex: 1;
  min-width: 240px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.cookie-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.cookie-btn {
  font-family: var(--font-head);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.5rem 1rem;
  border-radius: 0;
  cursor: pointer;
  border: 1px solid var(--border-solid);
  background: transparent;
  color: var(--text-primary);
}

.cookie-btn-accept {
  background: var(--accent);
  color: #fff !important;
  border-color: var(--accent);
}

.cookie-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  z-index: 400;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.cookie-modal.is-open { display: flex; }

.cookie-modal-panel {
  background: var(--bg-charcoal);
  border: 1px solid var(--border-solid);
  border-radius: var(--radius-card);
  padding: 1.5rem;
  max-width: 480px;
  width: 100%;
}

.cookie-modal-panel h3 { margin-bottom: 1rem; }

.cookie-toggle {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
}

/* Scroll reveal */
.js .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* 404 */
.error-page {
  text-align: center;
  padding: 6rem 1.5rem;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 4rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

/* Responsive */
@media (max-width: 960px) {
  .card-grid-3, .stack-grid, .metrics-strip { grid-template-columns: repeat(2, 1fr); }
  .hero-k-inner { grid-template-columns: 1fr; }
  .case-mosaic, .about-split, .contact-grid, .programme-card { grid-template-columns: 1fr; }
  .footer-grid, .legal-links { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition);
  }

  .sidebar.is-open { transform: translateX(0); }

  .sidebar-overlay.is-visible { display: block; }

  .main-wrap {
    margin-left: 0;
    width: 100%;
  }

  .mobile-menu-btn { display: block; }

  .cookie-banner { left: 0; }

  .card-grid-3, .card-grid-2, .stack-grid, .metrics-strip, .spec-table {
    grid-template-columns: 1fr;
  }

  .spec-row { display: block; }
  .spec-q, .spec-a { border-bottom: 1px solid var(--border); }
}